CN112377135A - Hydraulic reducing ball shaper for oil well casing - Google Patents
Hydraulic reducing ball shaper for oil well casing Download PDFInfo
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- CN112377135A CN112377135A CN202011258027.2A CN202011258027A CN112377135A CN 112377135 A CN112377135 A CN 112377135A CN 202011258027 A CN202011258027 A CN 202011258027A CN 112377135 A CN112377135 A CN 112377135A
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- 239000003129 oil well Substances 0.000 title claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims abstract description 49
- 238000004873 anchoring Methods 0.000 claims abstract description 35
- 230000006835 compression Effects 0.000 claims description 50
- 238000007906 compression Methods 0.000 claims description 50
- 238000007789 sealing Methods 0.000 claims description 19
- 239000004576 sand Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 45
- 239000010720 hydraulic oil Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to a casing shaper, in particular to an oil well casing hydraulic reducing ball shaper, and belongs to the technical field of oil and gas exploitation. The hydraulic power device comprises a hydraulic anchoring device, a hydraulic power device and a shaping head device, wherein the lower end of the hydraulic anchoring device is in threaded connection with the upper end of the hydraulic power device, and the lower end of the hydraulic power device is in threaded connection with the upper end of the shaping head device. When the hydraulic anchoring device anchors the shaper, the upper slip group and the lower slip group with the tooth shapes are simultaneously expanded radially outwards to realize double anchoring, and the anchoring performance is good; the hydraulic power device is formed by connecting five-stage hydraulic cylinders in series and can provide enough driving force for the piston rod; when the shaping head device is used for shaping, hydraulic oil is injected into a main feeding oil way of the piston rod, the piston rod moves downwards and drives the conical main core to slide downwards relative to the conical outer sleeve to enable the ball to protrude out of the conical outer sleeve, the diameter-reducing or deformation part of the sleeve is rolled to complete shaping operation, point contact shaping is adopted to compare with traditional surface contact shaping, the shaping effect is better, and the sleeve is not easily damaged.
Description
Technical Field
The invention relates to a casing shaper, in particular to an oil well casing hydraulic reducing ball shaper, and belongs to the technical field of oil and gas exploitation.
Background
As more and more oil fields are developed and enter the middle and later stages, the oil and gas wells are influenced by factors such as geology, engineering, corrosion and the like, and the oil and gas wells can deform in different degrees, so that the normal production of the oil fields is influenced. At present, after the casing pipe deforms, remedial measures of constructors are mainly divided into two types: one method is to utilize the explosive blasting to generate shock waves for shaping, namely, explosion shaping, and expand the diameter-reduced part through the shock waves so as to recover the normal operation of the oil well, but the using amount of the explosive is difficult to control, and the direction of the shock waves generated by the explosion cannot be accurately controlled, so that the sleeve is often damaged. The other type is to shape the deformed part of the casing by applying an acting force to the shaping head, namely mechanically shaping, and the shaping head is lowered to the deformed position of the casing to apply a force to the shaping head to forcibly extrude the deformed position of the casing, but the shaping head is easy to damage and has certain damage to the casing.
Disclosure of Invention
The invention aims to solve the problems and provides a hydraulic reducing ball shaper for an oil well casing, which adopts the following technical scheme:
the hydraulic reducing ball shaper for the oil well casing is characterized by comprising a hydraulic anchoring device, a hydraulic power device and a shaping head device, wherein the lower end of the hydraulic anchoring device is in threaded connection with the upper end of the hydraulic power device, and the lower end of the hydraulic power device is in threaded connection with the upper end of the shaping head device.
Preferably, the hydraulic anchoring device comprises an upper joint, an outer hook sleeve, an upper core sleeve, an upper connecting sleeve, an upper piston taper sleeve upper section, an upper compression spring, an upper inner sleeve, an upper slip group, an upper piston taper sleeve lower section, a lower core sleeve, a lower connecting sleeve, a lower piston taper sleeve, a lower compression spring, a lower inner sleeve, a lower slip group, a lower joint and a fixing sleeve; the upper joint is in threaded connection with the outer hook sleeve, the outer hook sleeve is in sliding connection with the upper connecting sleeve, the upper connecting sleeve is slidably mounted outside the upper core sleeve, the upper end of the upper core sleeve is axially positioned through a shaft shoulder in the outer hook sleeve, the lower end of the upper core sleeve is in threaded connection with the upper inner sleeve, the upper connecting sleeve is in threaded connection with the upper section of the upper piston cone sleeve, the lower end of the upper section of the upper piston cone sleeve is slidably mounted outside the upper inner sleeve, the upper compression spring is arranged in an annular space between the upper core sleeve and the upper section of the upper piston cone sleeve, the upper compression spring is positioned between the upper connecting sleeve and the upper inner sleeve, the lower section of the upper piston cone sleeve is slidably mounted outside the upper inner sleeve, the upper slip group is arranged between the upper section of the upper piston cone sleeve and the lower section of the upper piston cone sleeve, one end of the fixing sleeve is, the other end is in threaded connection with the lower core sleeve, the upper end of the lower core sleeve is axially positioned through the upper inner sleeve, the lower end of the lower core sleeve is in threaded connection with the lower inner sleeve, the lower core sleeve is externally and slidably mounted with the lower connecting sleeve, the upper end face of the lower connecting sleeve is in contact with the lower end face of the fixed sleeve, the lower connecting sleeve is in threaded connection with the lower piston taper sleeve, the lower end of the lower piston taper sleeve is slidably mounted outside the lower inner sleeve, the lower core sleeve is internally provided with the lower compression spring in the annular space of the lower piston taper sleeve, the lower compression spring is positioned between the lower connecting sleeve and the lower inner sleeve, the lower joint is in threaded connection with the lower inner sleeve, and the lower slip group is arranged between the lower joint and the lower piston taper sleeve.
Preferably, the hydraulic power device is formed by connecting five-stage hydraulic cylinders in series and comprises a piston rod, a hydraulic anchor joint, a cylinder body, a joint, a piston, a compression spring, a sealing device, a buffer sleeve and an end cover; the hydraulic anchor connect the upper end with lower clutch threaded connection, the lower extreme with cylinder body threaded connection, last one-level the cylinder body with end cover threaded connection, top-down has set gradually in the cylinder body connector, piston, compression spring, cushion collar, the piston rod passes the five grades of series connection in proper order connector, piston, compression spring, cushion collar and the end cover, wherein, connector fixed mounting be in the cylinder body, piston slidable mounting be in the cylinder body, the cushion collar with piston fixed connection, the piston rod with connector sliding connection, the piston rod with be fixed connection between the piston, compression spring set up in the connector with between the piston with be provided with sealing device between the cylinder body.
Preferably, the shaping head device comprises a sheath, a conical outer sleeve, a conical main core, a ball outer ball seat, a ball inner ball seat, a main core compression spring and a guide cone; the lower end of the piston rod penetrates through the protective sleeve and is fixedly connected with the conical main core, the protective sleeve is in threaded connection with the conical outer sleeve, the conical main core is installed inside the conical outer sleeve, the conical outer sleeve is provided with a plurality of uniformly distributed ball outer ball seats around the axis of the conical outer sleeve, the conical main core is provided with a plurality of uniformly distributed ball inner ball seats corresponding to the ball outer ball seats around the axis of the conical main core, the ball outer ball seats and the ball inner ball seats form a ball seat, the balls are movably installed in the ball seat, the conical outer sleeve is in threaded connection with the guide cone, an accommodating cavity is formed among the conical outer sleeve, the conical main core and the guide cone, and the main core compression spring is arranged in the accommodating cavity.
Preferably, the hydraulic anchoring device further comprises an upper annular spring leaf and a lower annular spring leaf, the upper slip group is slidably mounted outside the upper inner sleeve and is composed of two upper slips, the two upper slips are connected through the upper annular spring leaf, and a tooth shape is arranged on the outer cylindrical surface of the upper slip group; slip group slidable mounting is in down the endotheca outside and constitute by two slips down, just pass through between two slips down the annular spring leaf is connected down, be equipped with the profile of tooth on the outer cylindrical surface of slip group down.
Preferably, the lower end of the upper section of the upper piston taper sleeve is set to be a conical surface, the upper end of the lower section of the upper piston taper sleeve is set to be a conical surface, the upper end of the upper slip group is provided with a conical surface matched with the conical surface of the lower end of the upper section of the upper piston taper sleeve, and the lower end of the upper slip group is provided with a conical surface matched with the conical surface of the upper end of the lower section of the upper piston; the lower end of the lower piston taper sleeve is set to be a conical surface, the upper end of the lower joint is set to be a conical surface, the upper end of the lower slip group is provided with a conical surface matched with the conical surface of the lower end of the lower piston taper sleeve, and the lower end of the lower slip group is provided with a conical surface matched with the conical surface of the upper end of the lower joint.
Preferably, the upper section of the upper piston taper sleeve is provided with a plurality of uniformly distributed upper taper sleeve overflowing holes around the axis of the upper piston taper sleeve, the upper inner sleeve is provided with a plurality of uniformly distributed upper inner sleeve overflowing holes around the axis of the upper inner sleeve, and the upper taper sleeve overflowing holes, the upper inner sleeve overflowing holes and the inner cavity of the hydraulic anchoring device are communicated in sequence; the lower piston taper sleeve is provided with a plurality of uniformly distributed lower taper sleeve overflowing holes around the axis of the lower piston taper sleeve, the lower inner sleeve is provided with a plurality of uniformly distributed lower inner sleeve overflowing holes around the axis of the lower inner sleeve, and the lower taper sleeve overflowing holes, the lower inner sleeve overflowing holes and the inner cavity of the hydraulic anchoring device are communicated in sequence.
Preferably, a sealing device is arranged between the upper core sleeve and the upper joint, a sealing device is arranged between the upper inner sleeve and the upper section of the upper piston taper sleeve, and a sealing device is arranged between the lower inner sleeve and the lower piston taper sleeve.
Preferably, the piston rod is axially provided with a main feeding oil way, the piston rod is further provided with five branch feeding oil ways which are perpendicular to the main feeding oil way and are arranged in parallel at equal intervals, one end of each branch feeding oil way is communicated with the main feeding oil way, and the other end of each branch feeding oil way is communicated with a closed cavity formed among the connector, the piston and the piston rod; the piston rod is axially provided with a return main oil way which is parallel to the feed main oil way, the piston rod is also provided with five return branch oil ways which are perpendicular to the return main oil way and are parallel to the return main oil way at equal intervals, one end of each return branch oil way is communicated with the return main oil way, and the other end of each return branch oil way is communicated with an upper annular space formed between the connector and the piston rod.
Preferably, the connector at the bottommost of the hydraulic power device and the piston rod are provided with a piston rod seal therebetween, the connector at the bottommost of the hydraulic power device and the cylinder body are provided with a connector seal therebetween, and the end cover and the piston rod are provided with an end cover seal therebetween.
Preferably, a main core connecting hole is formed in the upper end of the conical main core, an internal thread is arranged in the main core connecting hole, and an external thread matched with the internal thread of the main core connecting hole is arranged at the lower end of the piston rod.
Preferably, the guide cone is provided with a sand discharge hole at the central position of the bottom, and the sand discharge hole is used for discharging silt entering the accommodating cavity when shaping the sleeve.
Preferably, the conical main core is slidably mounted inside the conical outer sleeve, a certain gap is formed between the conical outer sleeve and the conical main core, the shaping section of the conical outer sleeve comprises a first cylindrical portion and a first conical portion, the shaping section of the conical main core comprises a second cylindrical portion, a second conical portion and a transition conical portion used for connecting the cylindrical portion and the conical portion, the first cylindrical portion corresponds to the second cylindrical portion, the gap between the first cylindrical portion and the second conical portion is fixed, the first conical portion corresponds to the second conical portion, the gap between the first conical portion and the second conical portion is fixed, the bent portion of the first cylindrical portion and the first conical portion corresponds to the transition conical portion, and the gap between the first cylindrical portion and the first conical portion is gradually increased from top to bottom.
The invention has the following advantages: when the hydraulic anchoring device anchors the shaper, the upper slip group and the lower slip group with the tooth shapes expand outwards in the radial direction simultaneously to realize double anchoring, and the anchoring performance is good; the hydraulic power device is formed by connecting five-stage hydraulic cylinders in series, and can provide enough driving force for the piston rod; when the shaping head device is used for shaping, hydraulic oil is injected into the main feeding oil way of the piston rod, the piston rod moves downwards and drives the conical main core to slide downwards relative to the conical outer sleeve so that the ball protrudes out of the conical outer sleeve, and the reduced diameter or deformed part of the sleeve is rolled to finish shaping operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of an oil well casing hydraulic reducing ball shaper according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a hydraulic anchoring device of an oil well casing hydraulic reducing ball shaper according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a hydraulic power unit of an oil well casing hydraulic reducing ball shaper in an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a shaping head device of an oil well casing hydraulic reducing ball shaper according to an embodiment of the invention;
FIG. 5 is an enlarged view of the portion A in FIG. 4 of an oil well casing hydraulic reducing ball shaper in accordance with an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The hydraulic reducing ball shaper for oil well casings according to the embodiments of the present invention will be described in detail with reference to fig. 1 to 5.
Referring to fig. 1, an embodiment of the present invention provides an oil well casing hydraulic reducing ball shaper, including a hydraulic anchoring device 100, a hydraulic power device 200, and a shaping head device 300, wherein a lower end of the hydraulic anchoring device 100 is in threaded connection with an upper end of the hydraulic power device 200, and a lower end of the hydraulic power device 200 is in threaded connection with an upper end of the shaping head device 300. The hydraulic anchoring device 100 is used for fixing the shaper at the sleeve deformation position, the hydraulic power device 200 is used for driving the shaping head device 300, five-stage piston hydraulic cylinders are connected in series to increase the thrust of a piston rod, and the shaping head device 300 is used for shaping the deformed sleeve.
Referring to fig. 1 and 2, a hydraulic anchoring device 100 according to an embodiment of the present invention includes an upper joint 101, an outer hook sleeve 102, an upper core sleeve 103, an upper connecting sleeve 104, an upper piston cone sleeve upper section 105, an upper compression spring 107, an upper inner sleeve 108, an upper slip set 110, an upper piston cone sleeve lower section 112, a lower core sleeve 113, a lower connecting sleeve 114, a lower piston cone sleeve 115, a lower compression spring 117, a lower inner sleeve 118, a lower slip set 120, a lower joint 122, and a fixing sleeve 123; wherein, the lower end of the upper joint 101 is connected with the upper end of the outer sleeve 102 by screw thread, the upper connecting sleeve 104 is a step-shaped rotary structure, the lower end of the outer sleeve 102 is connected with the upper end of the upper connecting sleeve 104 in a sliding way, the upper connecting sleeve 104 is installed outside the upper core sleeve 103 in a sliding way, namely, the outer sleeve 102 is connected with the upper connecting sleeve 104 and the upper connecting sleeve 104 are connected with the upper core sleeve 103 in a sliding way, the upper end of the upper core sleeve 103 is axially positioned by an inner shoulder in the outer sleeve 102, the lower end is connected with the upper inner sleeve 108 by screw thread, the lower end of the upper connecting sleeve 104 is connected with the upper end of the upper piston cone sleeve upper section 105 by screw thread, the lower end of the upper piston cone sleeve upper section 105 is installed outside the upper inner sleeve 108 in a sliding way, an upper compression spring 107 is arranged in the annulus between the upper core sleeve 103 and the upper piston cone sleeve upper section 105, the upper compression spring 107 is located between the upper connecting sleeve 104 and, one end of the fixed sleeve 123 is in threaded connection with the upper inner sleeve 108, the other end of the fixed sleeve 123 is in threaded connection with the lower core sleeve 113, the upper end of the lower core sleeve 113 is axially positioned through the upper inner sleeve 108, the lower end of the lower core sleeve is in threaded connection with the lower inner sleeve 118, the lower connecting sleeve 114 is slidably mounted outside the lower core sleeve 113, the upper end face of the lower connecting sleeve 114 is in contact with the lower end face of the fixed sleeve 123, so that the axial positioning of the lower connecting sleeve 114 is completed, the lower end of the lower connecting sleeve 114 is in threaded connection with the upper end of the lower piston conical sleeve 115, the lower end of the lower piston conical sleeve 115 is slidably mounted outside the lower inner sleeve 118, a lower compression spring 117 is arranged in the annular space between the lower core sleeve 113 and the lower piston conical sleeve 115, the lower compression spring 117 is located between the lower connecting sleeve 114 and the lower inner sleeve 118, the.
It should be noted that the threaded connections between the components of the hydraulic anchoring device 100 are, from top to bottom: between the upper joint 101 and the outer hook sleeve 102, between the upper connecting sleeve 104 and the upper piston taper sleeve upper section 105, between the upper core sleeve 103 and the upper inner sleeve 108, between the upper inner sleeve 108 and the fixing sleeve 123, between the lower core sleeve 113 and the fixing sleeve 123, between the lower connecting sleeve 114 and the lower piston taper sleeve 115, between the lower core sleeve 113 and the lower inner sleeve 118, and between the lower inner sleeve 118 and the lower joint 122.
Referring to fig. 1 and 2, the hydraulic anchoring device 100 further includes an upper ring spring 111 and a lower ring spring 121, wherein the upper slip set 110 is slidably mounted outside the upper inner sleeve 108 and is formed by two upper slips, and the two upper slips are connected through the upper ring spring 111; in the initial position (before the shaper is fixed), the two upper slips are embraced outside the upper inner sleeve 108 through the upper ring-shaped spring piece 111, and at the moment, the upper piston cone sleeve upper section 105 is located at the upper limit position, namely, the upper piston cone sleeve upper section 105 is overlapped with the outer generatrix of the upper slip group 110 (see fig. 2). When the hydraulic oil drives the upper piston cone sleeve upper section 105 to move downwards, the upper piston cone sleeve upper section 105 transmits force to the upper slip group 110 through the conical inclined plane, and the two upper slips overcome elastic tension between the upper annular spring pieces 111 and move outwards in the radial direction to expand until the two upper slips are respectively pressed and fixed on the wall of the sleeve. In order to improve the fixing effect between the upper slip set 110 and the casing, the outer cylindrical surface of the upper slip set 110 is provided with a tooth shape. Similarly, the lower slip set 120 is slidably installed outside the lower inner sleeve 118 and is composed of two lower slips, and the two lower slips are connected through a lower annular spring leaf 121. In the initial position (before the shaper is fixed), the two lower slips are clasped outside the lower inner sleeve 118 through the lower ring spring leaf 121, and at the moment, the lower piston taper sleeve 115 is located at the upper limit position, namely, the lower piston taper sleeve 115 is overlapped with the outer generatrix of the lower slip set 120 (see fig. 2). When the hydraulic oil drives the lower piston taper sleeve 115 to move downwards, the lower piston taper sleeve 115 transmits force to the lower slip set 120 through the conical inclined surface, and the two lower slips overcome elastic pulling force between the lower annular spring pieces 121 and move outwards in the radial direction to expand until the two lower slips are respectively pressed and fixed on the wall of the casing. In order to improve the fixing effect between the lower slip set 120 and the casing, the outer cylindrical surface of the lower slip set 120 is provided with a tooth shape.
In order to improve the radial expansion effect of the upper slip group 110, the lower end of the upper section 105 of the upper piston taper sleeve is set to be a conical surface, the upper end of the lower section 112 of the upper piston taper sleeve is set to be a conical surface, the upper end of the upper slip group 110 is provided with a conical surface matched with the conical surface of the lower end of the upper section 105 of the upper piston taper sleeve, and the lower end of the upper slip group 110 is provided with a conical surface matched with the conical surface of the upper end of the lower section 112 of the. Similarly, in order to improve the radial expansion effect of the lower slip set 120, the lower end of the lower piston taper sleeve 115 is set as a conical surface, the upper end of the lower joint 122 is set as a conical surface, the upper end of the lower slip set 120 is provided with a conical surface matched with the conical surface at the lower end of the lower piston taper sleeve 115, and the lower end of the lower slip set 120 is provided with a conical surface matched with the conical surface at the upper end of the lower joint 122.
Referring to fig. 1 and 2, in order to realize the radial expansion and retraction of the upper slip set 110, the upper section 105 of the upper piston cone sleeve of the present invention is provided with a plurality of upper cone sleeve overflow holes 106 uniformly distributed around the axis thereof, the upper inner sleeve 108 is provided with a plurality of upper inner sleeve overflow holes 109 uniformly distributed around the axis thereof, and the upper cone sleeve overflow holes 106, the upper inner sleeve overflow holes 109 and the inner cavity of the hydraulic anchoring device 100 are sequentially communicated. High-pressure hydraulic oil enters the upper cone sleeve overflowing hole 106 through the inner cavity of the hydraulic anchoring device 100 and the upper inner sleeve overflowing hole 109, the upper piston cone sleeve upper section 105 is driven to move downwards under the action of the hydraulic oil, two upper slips of the upper slip set 110 overcome the elastic tension of the upper annular spring piece 111 and expand outwards in the radial direction to be fixed on the inner wall of the sleeve, in the process, the upper connecting sleeve 104 in threaded connection with the upper piston cone sleeve upper section 105 also moves downwards synchronously and compresses the upper compression spring 107, after oil supply is stopped, the upper connecting sleeve 104 moves upwards under the spring force of the upper compression spring 107 to reset, the upper piston cone sleeve upper section 105 also moves upwards synchronously along with the upper connecting sleeve, and at the moment, the two upper slips of the upper slip set 110 retract inwards in the radial direction to reset under the spring restoring force of the upper.
Similarly, in order to realize the radial expansion and retraction of the lower slip set 120, the lower piston taper sleeve 115 of the present invention is provided with a plurality of lower taper sleeve overflowing holes 116 uniformly distributed around the axis thereof, the lower inner sleeve 118 is provided with a plurality of lower inner sleeve overflowing holes 119 uniformly distributed around the axis thereof, and the lower taper sleeve overflowing holes 116, the lower inner sleeve overflowing holes 119, and the inner cavity of the hydraulic anchoring device 100 are sequentially communicated. High-pressure hydraulic oil enters the lower cone sleeve overflowing hole 116 through the inner cavity of the hydraulic anchoring device 100 and the lower inner sleeve overflowing hole 119, the lower piston cone sleeve 115 is driven to move downwards under the action of the hydraulic oil, the two lower slips of the lower slip set 120 overcome the elastic pulling force of the lower annular spring piece 121 and expand outwards in the radial direction to be fixed on the inner wall of the sleeve, the lower connecting sleeve 114 in threaded connection with the lower piston cone sleeve 115 also moves downwards synchronously and compresses the lower compression spring 117 in the process, after oil supply is stopped, the lower connecting sleeve 114 moves upwards under the spring force of the lower compression spring 117 to reset, the lower piston cone sleeve 115 also moves upwards synchronously, and at the moment, the two lower slips of the lower slip set 120 retract inwards in the radial direction to reset under the spring restoring force of the lower annular spring piece 121 to release fixation.
It should be noted that, in order to improve the sealing effect of the hydraulic anchoring device 100, a sealing device is arranged between the upper core sleeve 103 and the upper joint 101, a sealing device is arranged between the upper inner sleeve 108 and the upper piston cone sleeve upper section 105, and a sealing device is arranged between the lower inner sleeve 118 and the lower piston cone sleeve 115.
Referring to fig. 1 and 3, a hydraulic power device 200 according to an embodiment of the present invention is formed by connecting five-stage hydraulic cylinders in series, and includes a piston rod 201, a hydraulic anchor joint 202, a cylinder 203, a joint 204, a piston 205, a compression spring 206, a sealing device 207, a cushion collar 208, and an end cover 213; wherein, the upper end of the hydraulic anchor joint 202 is in threaded connection with the lower joint 122, thereby realizing the connection and fixation of the hydraulic anchoring device 100 and the hydraulic power device 200, the lower end of the hydraulic anchor joint 202 is in threaded connection with the cylinder body 203, the cylinder body 203 of the last stage hydraulic cylinder is in threaded connection with the end cover 213, the cylinder body 203 is internally provided with a connector 204, a piston 205, a compression spring 206 and a buffer sleeve 208 from top to bottom in sequence, a piston rod 201 sequentially passes through the connector 204, the piston 205, the compression spring 206, the buffer sleeve 208 and the end cover 213 of the five-stage hydraulic cylinder connected in series, the connecting head 204 is fixedly installed in the cylinder 203, the piston 205 is slidably installed in the cylinder 203, the buffer sleeve 208 is fixedly connected with the piston 205, the piston rod 201 is slidably connected with the connecting head 204, the piston rod 201 is fixedly connected with the piston 205, the compression spring 206 is arranged between the connecting head 204 and the piston 205, and the sealing device 207 is arranged between the piston 205 and the cylinder 203.
It should be noted that the compression spring 206 is used for slowing down the movement speed of the piston rod 201 when the piston rod 201 returns, so as to prevent the piston 205 from colliding with the connecting head 204 and being damaged. Preferably, compression spring 206 is selected from a standard conventional cylindrical coil compression spring, YA 5X 45X 140 left GB/T2089, and the material is selected from high-resilience stainless steel 60Si2Mn, with five compression springs 206 being of the same type. The buffer sleeve 208 is used for preventing the piston 205 from colliding with the connecting head 204 of the lower hydraulic cylinder to damage the piston 201 during the feeding movement of the piston rod. In addition, the cylinder 203 is made of precipitated stainless steel 0Cr17Ni4Cu4Nb, and the piston rod 201 is made of precipitated stainless steel 0Cr17Ni4Cu4 Nb.
Referring to fig. 3, in order to realize the feeding action of the piston rod 201, the piston rod 201 of the present invention is axially provided with a main feeding oil path 209, the piston rod 201 is further provided with five branch feeding oil paths 210 which are perpendicular to the main feeding oil path 209 and are arranged in parallel at equal intervals, one end of each branch feeding oil path 210 is communicated with the main feeding oil path 209, and the other end is communicated with a closed cavity formed among the connecting head 204, the piston 205 and the piston rod 201. Specifically, high-pressure hydraulic oil flows through a main feeding oil path 209 from top to bottom in sequence and enters a closed cavity formed among the connecting heads 204 of the hydraulic cylinders at all levels, the pistons 205 and the piston rods 201 through a branch feeding oil path 210, the pistons 205 in the cylinder body 203 are fixed with the piston rods 201, so that the pistons 205 at five levels generate downward thrust under the action of the high-pressure hydraulic oil and form resultant force to act on the piston rods 201, the piston rods 201 move downward, the front ends of the piston rods 201 are connected with a shaping head device 300 through threads, and the shaping task can be completed by gradually expanding the diameter of a deformed sleeve.
In order to realize the return action of the piston rod 201, the piston rod 201 of the invention is axially provided with a main return oil path 211 which is parallel to the main feed oil path 209, the piston rod 201 is also provided with five branch return oil paths 212 which are perpendicular to the main return oil path 211 and are parallel to the main return oil path 211 at equal intervals, one end of each branch return oil path 212 is communicated with the main return oil path 211, and the other end of each branch return oil path is communicated with an upper annular space formed between the connecting head 204 and the piston rod 201. Specifically, high-pressure hydraulic oil sequentially flows through a return branch oil path 212 from top to bottom through a return main oil path 211 to enter an upper annular space between a connecting head 204 of each hydraulic cylinder and the piston rod 201, and under the action of the high-pressure hydraulic oil, the five-stage piston 205 can generate upward thrust and form resultant force to act on the piston rod 201, so that the piston rod 201 moves upward, returns to reset, and completes one working cycle. In this process, the feed main oil passage 209 serves as an oil return passage.
It should be noted that, in order to improve the sealing effect of the hydraulic power device 200, in the present invention, a piston rod seal 214 is disposed between the connecting head 204 at the bottommost portion of the hydraulic power device 200 and the piston rod 201, and preferably, the piston rod seal 214 is an O-shaped sealing ring; a connector seal 215 is arranged between the connector 204 at the bottommost part of the hydraulic power device 200 and the cylinder body 203, and preferably, the connector seal 215 adopts an O-shaped sealing ring; an end cap seal 216 is disposed between the end cap 213 and the piston rod 201, and preferably, the end cap seal 216 is an O-ring seal.
Referring to fig. 4 and 5, an orthopaedic head assembly 300 according to an embodiment of the present invention includes a sheath 301, a tapered outer sleeve 302, a tapered main core 303, balls 305, ball outer seats 306, ball inner seats 307, main core compression springs 308, and a guide cone 309; wherein, the lower extreme of piston rod 201 passes sheath 301 and toper owner core 303 fixed connection, and then realizes that hydraulic power device 200 is fixed with the threaded connection of plastic first device 300, specifically, has seted up main core connecting hole 304 in toper owner core 303 upper end, and main core connecting hole 304 is provided with the internal thread, and the piston rod 201 lower extreme is provided with the external screw thread with main core connecting hole 304 female thread fit, and piston rod 201 is in the same place through screw-thread fit with main core connecting hole 304. Sheath 301 and toper overcoat 302 threaded connection, toper owner core 303 slidable mounting is inside toper overcoat 302, toper overcoat 302 is seted up a plurality of evenly distributed's ball outer ball seat 306 around its axis, toper owner core 303 is seted up a plurality of evenly distributed's the corresponding ball inner ball seat 307 of ball outer ball seat 306 around its axis, ball outer ball seat 306 constitutes the ball seat with ball inner ball seat 307, ball 305 movable mounting is in the ball seat, toper overcoat 302 and guide cone 309 threaded connection, toper overcoat 302, toper owner core 303, form the holding cavity between the guide cone 309 three, main core compression spring 308 sets up in the holding cavity. As shown in fig. 5, the cross-section of the ball outer ball seat 306 is an isosceles trapezoid, which is gradually reduced from the inside to the outside along the radial direction, and the diameter of the ball 305 is smaller than the inner diameter of the ball outer ball seat 306 (i.e., the lower bottom of the trapezoid), and the diameter of the ball 305 is larger than the outer diameter of the ball outer ball seat 306 (i.e., the upper bottom of the trapezoid), so as to ensure that the ball 305 can roll in the ball seat, but not.
In order to prevent silt from entering the accommodating cavity through the ball seat and causing siltation, the bottom center of the guide cone 309 is provided with a sand discharge hole 310, and the sand discharge hole 310 is used for discharging silt entering the accommodating cavity when the casing is shaped; the guide cone 309 is used for removing residual obstacles when the shaping head device 300 is lowered so as to protect the ball 305; the main core compression spring 308 is used for buffering the relative sliding between the tapered main core 303 and the tapered outer sleeve 302, and slowing down the extrusion acting force and extrusion speed of the tapered main core 303 to the balls, so that the purpose of protecting the balls 305 to prolong the service life of the balls 305 is achieved.
It should be noted that the main core compression spring 308 is used for speed buffering when the tapered main core 303 moves downwards relative to the tapered outer sleeve 302, so as to prevent the ball 305 from being stressed too much to cause damage to the shaping head device 300; the main core compression spring 308 is selected from standard common cylindrical helical compression springs, YA 14 × 85 × 340 left GB/T2089, and the material is high-elasticity stainless steel 60Si2 Mn. The materials of the sheath 301, the tapered outer sleeve 302, the tapered main core 303, the ball 305 and the guide cone 309 are all made of cemented carbide.
Referring to fig. 5, the tapered main core 303 is slidably mounted inside the tapered outer sleeve 302, a gap is formed between the tapered outer sleeve 302 and the tapered main core 303, the shaping section of the tapered outer sleeve 302 includes a first cylindrical portion and a first conical portion, the shaping section of the tapered main core 303 includes a second cylindrical portion, a second conical portion, and a transition conical portion for connecting the cylindrical portion and the conical portion, the first cylindrical portion corresponds to the second cylindrical portion, the gap between the first cylindrical portion and the second conical portion is fixed, the first conical portion corresponds to the second conical portion, the gap between the first conical portion and the second conical portion is fixed, the bent portion of the first cylindrical portion and the first conical portion corresponds to the transition conical portion, and the gap between the first cylindrical portion and the first conical portion is gradually increased from top to bottom. By so arranging, the tapered main core 303 can be ensured to perform short-stroke sliding relative to the tapered outer sleeve 302.
It should be noted that, in the shaping head device 300 according to the embodiment of the present invention, the radial position of the ball 305 in the ball seat is changed by the short-stroke sliding of the tapered main core 303 relative to the tapered outer sleeve 302, and the shaping and repairing operation of the deformed sleeve is completed by rolling the deformed position of the sleeve by the ball 305.
Before the shaping operation is started, the computer simulates and calculates the resistance of the shaper after reaching the deformation position of the casing, then the shaper is slowly lowered in the casing, and when the resistance of the shaper is similar to the simulated calculation value and gradually increases in the lowering process, the diameter reduction or deformation position of the casing can be determined. Stopping downward placing at the moment, starting to introduce hydraulic oil into the shaper and pressurize the shaper, and when the pressure reaches a set value, radially expanding the upper slip group 110 and the lower slip group 120 of the hydraulic anchoring device 100 outwards to realize anchoring of the shaper; the thrust required by the shaping head device 300 during shaping is provided by a hydraulic power device 200 formed by connecting five stages of hydraulic cylinders in series; hydraulic oil is injected into the main feeding oil path 209 of the piston rod 201, the piston rod 201 moves downwards and drives the conical main core 303 to slide downwards relative to the conical outer sleeve 302, so that the ball 305 protrudes out of the conical outer sleeve 302, and the diameter-reduced or deformed part of the sleeve is rolled to finish the shaping operation. After shaping is finished, the pressure of the hydraulic oil on the ground is released, and the upper slip set 110 and the lower slip set 120 reset under the action of the upper compression spring 107 and the lower compression spring 117 respectively to release the anchor; when the return main oil path 211 of the piston rod 201 is filled with hydraulic oil, the piston rod 201 moves upwards to reset, and drives the conical main core 303 to slide upwards relative to the conical outer sleeve 302 to reset the ball 305.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. The hydraulic reducing ball shaper for the oil well casing is characterized by comprising a hydraulic anchoring device, a hydraulic power device and a shaping head device, wherein the lower end of the hydraulic anchoring device is in threaded connection with the upper end of the hydraulic power device, and the lower end of the hydraulic power device is in threaded connection with the upper end of the shaping head device.
The hydraulic anchoring device comprises an upper joint, an outer hook sleeve, an upper core sleeve, an upper connecting sleeve, an upper piston taper sleeve upper section, an upper compression spring, an upper inner sleeve, an upper slip group, an upper piston taper sleeve lower section, a lower core sleeve, a lower connecting sleeve, a lower piston taper sleeve, a lower compression spring, a lower inner sleeve, a lower slip group, a lower joint and a fixing sleeve; the upper joint is in threaded connection with the outer hook sleeve, the outer hook sleeve is in sliding connection with the upper connecting sleeve, the upper connecting sleeve is slidably mounted outside the upper core sleeve, the upper end of the upper core sleeve is axially positioned through a shaft shoulder in the outer hook sleeve, the lower end of the upper core sleeve is in threaded connection with the upper inner sleeve, the upper connecting sleeve is in threaded connection with the upper section of the upper piston cone sleeve, the lower end of the upper section of the upper piston cone sleeve is slidably mounted outside the upper inner sleeve, the upper compression spring is arranged in an annular space between the upper core sleeve and the upper section of the upper piston cone sleeve, the upper compression spring is positioned between the upper connecting sleeve and the upper inner sleeve, the lower section of the upper piston cone sleeve is slidably mounted outside the upper inner sleeve, the upper slip group is arranged between the upper section of the upper piston cone sleeve and the lower section of the upper piston cone sleeve, one end of the fixing sleeve is, the other end is in threaded connection with the lower core sleeve, the upper end of the lower core sleeve is axially positioned through the upper inner sleeve, the lower end of the lower core sleeve is in threaded connection with the lower inner sleeve, the lower core sleeve is externally and slidably mounted with the lower connecting sleeve, the upper end face of the lower connecting sleeve is in contact with the lower end face of the fixed sleeve, the lower connecting sleeve is in threaded connection with the lower piston taper sleeve, the lower end of the lower piston taper sleeve is slidably mounted outside the lower inner sleeve, the lower core sleeve is internally provided with the lower compression spring in the annular space of the lower piston taper sleeve, the lower compression spring is positioned between the lower connecting sleeve and the lower inner sleeve, the lower joint is in threaded connection with the lower inner sleeve, and the lower slip group is arranged between the lower joint and the lower piston taper sleeve.
The hydraulic power device is formed by connecting five-stage hydraulic cylinders in series and comprises a piston rod, a hydraulic anchor joint, a cylinder body, a joint, a piston, a compression spring, a sealing device, a buffer sleeve and an end cover; the hydraulic anchor connect the upper end with lower clutch threaded connection, the lower extreme with cylinder body threaded connection, last one-level the cylinder body with end cover threaded connection, top-down has set gradually in the cylinder body connector, piston, compression spring, cushion collar, the piston rod passes the five grades of series connection in proper order connector, piston, compression spring, cushion collar and the end cover, wherein, connector fixed mounting be in the cylinder body, piston slidable mounting be in the cylinder body, the cushion collar with piston fixed connection, the piston rod with connector sliding connection, the piston rod with be fixed connection between the piston, compression spring set up in the connector with between the piston with be provided with sealing device between the cylinder body.
The shaping head device comprises a sheath, a conical outer sleeve, a conical main core, a ball outer ball seat, a ball inner ball seat, a main core compression spring and a guide cone; the lower end of the piston rod penetrates through the protective sleeve and is fixedly connected with the conical main core, the protective sleeve is in threaded connection with the conical outer sleeve, the conical main core is installed inside the conical outer sleeve, the conical outer sleeve is provided with a plurality of uniformly distributed ball outer ball seats around the axis of the conical outer sleeve, the conical main core is provided with a plurality of uniformly distributed ball inner ball seats corresponding to the ball outer ball seats around the axis of the conical main core, the ball outer ball seats and the ball inner ball seats form a ball seat, the balls are movably installed in the ball seat, the conical outer sleeve is in threaded connection with the guide cone, an accommodating cavity is formed among the conical outer sleeve, the conical main core and the guide cone, and the main core compression spring is arranged in the accommodating cavity.
2. The oil well casing hydraulic reducing ball shaper according to claim 1, wherein the hydraulic anchoring device further comprises an upper ring spring plate and a lower ring spring plate, the upper slip set is slidably mounted outside the upper inner sleeve and is composed of two upper slips, the two upper slips are connected through the upper ring spring plate, and the outer cylindrical surface of the upper slip set is provided with a tooth shape; slip group slidable mounting is in down the endotheca outside and constitute by two slips down, just pass through between two slips down the annular spring leaf is connected down, be equipped with the profile of tooth on the outer cylindrical surface of slip group down.
3. The oil well casing hydraulic reducing ball shaper according to claim 2, wherein the upper end of the upper section of the upper piston taper sleeve is provided with a conical surface, the upper end of the lower section of the upper piston taper sleeve is provided with a conical surface which is matched with the conical surface of the upper end of the upper section of the upper piston taper sleeve, and the lower end of the upper slip group is provided with a conical surface which is matched with the conical surface of the upper end of the lower section of the upper piston taper sleeve; the lower end of the lower piston taper sleeve is set to be a conical surface, the upper end of the lower joint is set to be a conical surface, the upper end of the lower slip group is provided with a conical surface matched with the conical surface of the lower end of the lower piston taper sleeve, and the lower end of the lower slip group is provided with a conical surface matched with the conical surface of the upper end of the lower joint.
4. The oil well casing hydraulic reducing ball shaper according to claim 3, wherein the upper section of the upper piston cone is provided with a plurality of upper cone flow passing holes which are uniformly distributed around the axis of the upper piston cone, the upper inner sleeve is provided with a plurality of upper inner sleeve flow passing holes which are uniformly distributed around the axis of the upper inner sleeve, and the upper cone flow passing holes, the upper inner sleeve flow passing holes and the inner cavity of the hydraulic anchoring device are communicated in sequence; the lower piston taper sleeve is provided with a plurality of uniformly distributed lower taper sleeve overflowing holes around the axis of the lower piston taper sleeve, the lower inner sleeve is provided with a plurality of uniformly distributed lower inner sleeve overflowing holes around the axis of the lower inner sleeve, and the lower taper sleeve overflowing holes, the lower inner sleeve overflowing holes and the inner cavity of the hydraulic anchoring device are communicated in sequence.
5. The oil well casing hydraulic reducing ball shaper according to claim 4, wherein a sealing device is provided between the upper core sleeve and the upper nipple, a sealing device is provided between the upper inner sleeve and the upper piston cone upper section, and a sealing device is provided between the lower inner sleeve and the lower piston cone.
6. The oil well casing hydraulic reducing ball shaper according to claim 1, wherein the piston rod is axially provided with a main feeding oil path, the piston rod is further provided with five branch feeding oil paths which are perpendicular to the main feeding oil path and are arranged in parallel at equal intervals, one end of each branch feeding oil path is communicated with the main feeding oil path, and the other end of each branch feeding oil path is communicated with a closed cavity formed among the connector, the piston and the piston rod; the piston rod is axially provided with a return main oil way which is parallel to the feed main oil way, the piston rod is also provided with five return branch oil ways which are perpendicular to the return main oil way and are parallel to the return main oil way at equal intervals, one end of each return branch oil way is communicated with the return main oil way, and the other end of each return branch oil way is communicated with an upper annular space formed between the connector and the piston rod.
7. The oil well casing hydraulic reducing ball shaper according to claim 6, wherein a piston rod seal is provided between the bottommost connector of the hydraulic power unit and the piston rod, a connector seal is provided between the bottommost connector of the hydraulic power unit and the cylinder body, and an end cap seal is provided between the end cap and the piston rod.
8. The oil well casing hydraulic ball shaper according to claim 1, wherein the tapered main core has a main core attachment hole formed at an upper end thereof, the main core attachment hole being provided with an internal thread, and the lower end of the piston rod being provided with an external thread that is in threaded engagement with the main core attachment hole.
9. The oil well casing hydraulic ball shaper according to claim 8, wherein the guide cone has a sand discharge hole at a central position of a bottom thereof, and the sand discharge hole is used for discharging silt entering the accommodating cavity during casing shaping.
10. The oil well casing hydraulic ball shaper according to claim 9, wherein the tapered main core is slidably mounted inside the tapered outer casing with a gap therebetween, the shaping section of the tapered outer casing comprises a first cylindrical portion and a first conical portion, the shaping section of the tapered main core comprises a second cylindrical portion, a second conical portion, and a transition conical portion for joining the cylindrical portion and the conical portion, the first cylindrical portion and the second cylindrical portion correspond to each other with a constant gap therebetween, the first conical portion and the second conical portion correspond to each other with a constant gap therebetween, the bent portion of the first cylindrical portion and the first conical portion corresponds to the transition conical portion with a gradually increasing gap therebetween from top to bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011258027.2A CN112377135A (en) | 2020-11-12 | 2020-11-12 | Hydraulic reducing ball shaper for oil well casing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011258027.2A CN112377135A (en) | 2020-11-12 | 2020-11-12 | Hydraulic reducing ball shaper for oil well casing |
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| CN112377135A true CN112377135A (en) | 2021-02-19 |
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| CN202011258027.2A Pending CN112377135A (en) | 2020-11-12 | 2020-11-12 | Hydraulic reducing ball shaper for oil well casing |
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| CN113006725A (en) * | 2021-04-19 | 2021-06-22 | 东北石油大学 | Rolling shaping mechanism and sleeve shaping tool |
| CN113846989A (en) * | 2021-09-28 | 2021-12-28 | 刘东武 | Seat seal suspension pressure testing device |
| CN117266776A (en) * | 2023-11-14 | 2023-12-22 | 东营市恒信机械有限责任公司 | Hydraulic bidirectional expansion shaping device for underground casing |
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| CN117266776B (en) * | 2023-11-14 | 2024-01-30 | 东营市恒信机械有限责任公司 | Hydraulic bidirectional expansion shaping device for underground casing |
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Application publication date: 20210219 |